Operation Manual 37107F
MFR 3 - Multi Function Relay
© Woodward
Page 119/165
Breaker Logic via Discrete Input [D03]
Parameter
199
Breaker logic
via term.64 ON
Breaker logic via discrete input [D03]
ON/OFF
ON
................ This discrete input is used as a control input:
•
Discrete input [D03] (terminal 64) is
not energized
:
The breaker logic configured in Parameter 94 is used
•
Discrete input [D03] (terminal 64) is
energized
:
The breaker logic configured in Parameter 200 is used
OFF
.............. The discrete input is used as an alarm input.
Parameter
200
Breaker logic:
----------------
Breaker logic
see below
The unit automatically controls the two breakers (MCB and GCB). In this case, up
to five control functions (modes) may be selected. These are: EXTERNAL,
PARALLEL, OPEN TRANSIT, CLOSED TRANSIT and INTERCHANGE.
NOTE
For a dead bus start it is necessary to enable the dead bus start function. To trigger the watchdogs
"generator underfrequency" as well as "generator undervoltage", terminal 6 (enable monitoring) must
be energized. It is possible to switch the breaker logic by energizing and de-energizing discrete input
[D03] (terminal 64). The second breaker logic may be configured during the configuration of the dis-
crete inputs. When discrete input [D03] is energized, the second breaker logic is enabled.
Discrete inputs: Setting
Discrete
input
1 2 3 4 5 6 7 8 9 10 11 12
Number
1 2 3 4 5 6 7 8 9 A B C
Terminal
62 63 64 65 66 67 68 69 70 71 72 73
Function A/C
A/C
A/C
Alarm
input
A/C..Alarm or control input (dependent on configuration)
NOTE
Operating current (NO, make contact): The discrete input is enabled by energizing it.
This does not provide wire break monitoring!
Closed circuit current (NC, break contact): The discrete input is enabled by de-energizing it.
This may provide wire break monitoring.
Example:
Discrete inputs 1 through 4 (same procedure for inputs 5 to 12)
Parameter
201
Dig.input 1234
function EEEE
Discrete input: function
E/D
The alarm inputs can be enabled regardless if the contact is configured as an oper-
ating current (NO) or an idle current (NC) contact. The idle current input enables
monitoring for an opening in the circuit. Either a positive or a negative polarity vol-
tage may be applied.
E
Enable to operate as an operating current (NO) contact. Energizing the discrete
input enables the alarm.
D
Disable to operate as a closed circuit current (NC) contact. De-energizing the
discrete input enables the alarm.